Go mod tidy

1 files changed, 0 insertions, 801 deletions

diff --git a/vendor/github.com/golang/protobuf/proto/text_decode.go b/vendor/github.com/golang/protobuf/proto/text_decode.go
deleted file mode 100644
index 47eb3e4..0000000
--- a/vendor/github.com/golang/protobuf/proto/text_decode.go
+++ /dev/null
@@ -1,801 +0,0 @@
-// Copyright 2010 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package proto
-
-import (
-	"encoding"
-	"errors"
-	"fmt"
-	"reflect"
-	"strconv"
-	"strings"
-	"unicode/utf8"
-
-	"google.golang.org/protobuf/encoding/prototext"
-	protoV2 "google.golang.org/protobuf/proto"
-	"google.golang.org/protobuf/reflect/protoreflect"
-	"google.golang.org/protobuf/reflect/protoregistry"
-)
-
-const wrapTextUnmarshalV2 = false
-
-// ParseError is returned by UnmarshalText.
-type ParseError struct {
-	Message string
-
-	// Deprecated: Do not use.
-	Line, Offset int
-}
-
-func (e *ParseError) Error() string {
-	if wrapTextUnmarshalV2 {
-		return e.Message
-	}
-	if e.Line == 1 {
-		return fmt.Sprintf("line 1.%d: %v", e.Offset, e.Message)
-	}
-	return fmt.Sprintf("line %d: %v", e.Line, e.Message)
-}
-
-// UnmarshalText parses a proto text formatted string into m.
-func UnmarshalText(s string, m Message) error {
-	if u, ok := m.(encoding.TextUnmarshaler); ok {
-		return u.UnmarshalText([]byte(s))
-	}
-
-	m.Reset()
-	mi := MessageV2(m)
-
-	if wrapTextUnmarshalV2 {
-		err := prototext.UnmarshalOptions{
-			AllowPartial: true,
-		}.Unmarshal([]byte(s), mi)
-		if err != nil {
-			return &ParseError{Message: err.Error()}
-		}
-		return checkRequiredNotSet(mi)
-	} else {
-		if err := newTextParser(s).unmarshalMessage(mi.ProtoReflect(), ""); err != nil {
-			return err
-		}
-		return checkRequiredNotSet(mi)
-	}
-}
-
-type textParser struct {
-	s            string // remaining input
-	done         bool   // whether the parsing is finished (success or error)
-	backed       bool   // whether back() was called
-	offset, line int
-	cur          token
-}
-
-type token struct {
-	value    string
-	err      *ParseError
-	line     int    // line number
-	offset   int    // byte number from start of input, not start of line
-	unquoted string // the unquoted version of value, if it was a quoted string
-}
-
-func newTextParser(s string) *textParser {
-	p := new(textParser)
-	p.s = s
-	p.line = 1
-	p.cur.line = 1
-	return p
-}
-
-func (p *textParser) unmarshalMessage(m protoreflect.Message, terminator string) (err error) {
-	md := m.Descriptor()
-	fds := md.Fields()
-
-	// A struct is a sequence of "name: value", terminated by one of
-	// '>' or '}', or the end of the input.  A name may also be
-	// "[extension]" or "[type/url]".
-	//
-	// The whole struct can also be an expanded Any message, like:
-	// [type/url] < ... struct contents ... >
-	seen := make(map[protoreflect.FieldNumber]bool)
-	for {
-		tok := p.next()
-		if tok.err != nil {
-			return tok.err
-		}
-		if tok.value == terminator {
-			break
-		}
-		if tok.value == "[" {
-			if err := p.unmarshalExtensionOrAny(m, seen); err != nil {
-				return err
-			}
-			continue
-		}
-
-		// This is a normal, non-extension field.
-		name := protoreflect.Name(tok.value)
-		fd := fds.ByName(name)
-		switch {
-		case fd == nil:
-			gd := fds.ByName(protoreflect.Name(strings.ToLower(string(name))))
-			if gd != nil && gd.Kind() == protoreflect.GroupKind && gd.Message().Name() == name {
-				fd = gd
-			}
-		case fd.Kind() == protoreflect.GroupKind && fd.Message().Name() != name:
-			fd = nil
-		case fd.IsWeak() && fd.Message().IsPlaceholder():
-			fd = nil
-		}
-		if fd == nil {
-			typeName := string(md.FullName())
-			if m, ok := m.Interface().(Message); ok {
-				t := reflect.TypeOf(m)
-				if t.Kind() == reflect.Ptr {
-					typeName = t.Elem().String()
-				}
-			}
-			return p.errorf("unknown field name %q in %v", name, typeName)
-		}
-		if od := fd.ContainingOneof(); od != nil && m.WhichOneof(od) != nil {
-			return p.errorf("field '%s' would overwrite already parsed oneof '%s'", name, od.Name())
-		}
-		if fd.Cardinality() != protoreflect.Repeated && seen[fd.Number()] {
-			return p.errorf("non-repeated field %q was repeated", fd.Name())
-		}
-		seen[fd.Number()] = true
-
-		// Consume any colon.
-		if err := p.checkForColon(fd); err != nil {
-			return err
-		}
-
-		// Parse into the field.
-		v := m.Get(fd)
-		if !m.Has(fd) && (fd.IsList() || fd.IsMap() || fd.Message() != nil) {
-			v = m.Mutable(fd)
-		}
-		if v, err = p.unmarshalValue(v, fd); err != nil {
-			return err
-		}
-		m.Set(fd, v)
-
-		if err := p.consumeOptionalSeparator(); err != nil {
-			return err
-		}
-	}
-	return nil
-}
-
-func (p *textParser) unmarshalExtensionOrAny(m protoreflect.Message, seen map[protoreflect.FieldNumber]bool) error {
-	name, err := p.consumeExtensionOrAnyName()
-	if err != nil {
-		return err
-	}
-
-	// If it contains a slash, it's an Any type URL.
-	if slashIdx := strings.LastIndex(name, "/"); slashIdx >= 0 {
-		tok := p.next()
-		if tok.err != nil {
-			return tok.err
-		}
-		// consume an optional colon
-		if tok.value == ":" {
-			tok = p.next()
-			if tok.err != nil {
-				return tok.err
-			}
-		}
-
-		var terminator string
-		switch tok.value {
-		case "<":
-			terminator = ">"
-		case "{":
-			terminator = "}"
-		default:
-			return p.errorf("expected '{' or '<', found %q", tok.value)
-		}
-
-		mt, err := protoregistry.GlobalTypes.FindMessageByURL(name)
-		if err != nil {
-			return p.errorf("unrecognized message %q in google.protobuf.Any", name[slashIdx+len("/"):])
-		}
-		m2 := mt.New()
-		if err := p.unmarshalMessage(m2, terminator); err != nil {
-			return err
-		}
-		b, err := protoV2.Marshal(m2.Interface())
-		if err != nil {
-			return p.errorf("failed to marshal message of type %q: %v", name[slashIdx+len("/"):], err)
-		}
-
-		urlFD := m.Descriptor().Fields().ByName("type_url")
-		valFD := m.Descriptor().Fields().ByName("value")
-		if seen[urlFD.Number()] {
-			return p.errorf("Any message unpacked multiple times, or %q already set", urlFD.Name())
-		}
-		if seen[valFD.Number()] {
-			return p.errorf("Any message unpacked multiple times, or %q already set", valFD.Name())
-		}
-		m.Set(urlFD, protoreflect.ValueOfString(name))
-		m.Set(valFD, protoreflect.ValueOfBytes(b))
-		seen[urlFD.Number()] = true
-		seen[valFD.Number()] = true
-		return nil
-	}
-
-	xname := protoreflect.FullName(name)
-	xt, _ := protoregistry.GlobalTypes.FindExtensionByName(xname)
-	if xt == nil && isMessageSet(m.Descriptor()) {
-		xt, _ = protoregistry.GlobalTypes.FindExtensionByName(xname.Append("message_set_extension"))
-	}
-	if xt == nil {
-		return p.errorf("unrecognized extension %q", name)
-	}
-	fd := xt.TypeDescriptor()
-	if fd.ContainingMessage().FullName() != m.Descriptor().FullName() {
-		return p.errorf("extension field %q does not extend message %q", name, m.Descriptor().FullName())
-	}
-
-	if err := p.checkForColon(fd); err != nil {
-		return err
-	}
-
-	v := m.Get(fd)
-	if !m.Has(fd) && (fd.IsList() || fd.IsMap() || fd.Message() != nil) {
-		v = m.Mutable(fd)
-	}
-	v, err = p.unmarshalValue(v, fd)
-	if err != nil {
-		return err
-	}
-	m.Set(fd, v)
-	return p.consumeOptionalSeparator()
-}
-
-func (p *textParser) unmarshalValue(v protoreflect.Value, fd protoreflect.FieldDescriptor) (protoreflect.Value, error) {
-	tok := p.next()
-	if tok.err != nil {
-		return v, tok.err
-	}
-	if tok.value == "" {
-		return v, p.errorf("unexpected EOF")
-	}
-
-	switch {
-	case fd.IsList():
-		lv := v.List()
-		var err error
-		if tok.value == "[" {
-			// Repeated field with list notation, like [1,2,3].
-			for {
-				vv := lv.NewElement()
-				vv, err = p.unmarshalSingularValue(vv, fd)
-				if err != nil {
-					return v, err
-				}
-				lv.Append(vv)
-
-				tok := p.next()
-				if tok.err != nil {
-					return v, tok.err
-				}
-				if tok.value == "]" {
-					break
-				}
-				if tok.value != "," {
-					return v, p.errorf("Expected ']' or ',' found %q", tok.value)
-				}
-			}
-			return v, nil
-		}
-
-		// One value of the repeated field.
-		p.back()
-		vv := lv.NewElement()
-		vv, err = p.unmarshalSingularValue(vv, fd)
-		if err != nil {
-			return v, err
-		}
-		lv.Append(vv)
-		return v, nil
-	case fd.IsMap():
-		// The map entry should be this sequence of tokens:
-		//	< key : KEY value : VALUE >
-		// However, implementations may omit key or value, and technically
-		// we should support them in any order.
-		var terminator string
-		switch tok.value {
-		case "<":
-			terminator = ">"
-		case "{":
-			terminator = "}"
-		default:
-			return v, p.errorf("expected '{' or '<', found %q", tok.value)
-		}
-
-		keyFD := fd.MapKey()
-		valFD := fd.MapValue()
-
-		mv := v.Map()
-		kv := keyFD.Default()
-		vv := mv.NewValue()
-		for {
-			tok := p.next()
-			if tok.err != nil {
-				return v, tok.err
-			}
-			if tok.value == terminator {
-				break
-			}
-			var err error
-			switch tok.value {
-			case "key":
-				if err := p.consumeToken(":"); err != nil {
-					return v, err
-				}
-				if kv, err = p.unmarshalSingularValue(kv, keyFD); err != nil {
-					return v, err
-				}
-				if err := p.consumeOptionalSeparator(); err != nil {
-					return v, err
-				}
-			case "value":
-				if err := p.checkForColon(valFD); err != nil {
-					return v, err
-				}
-				if vv, err = p.unmarshalSingularValue(vv, valFD); err != nil {
-					return v, err
-				}
-				if err := p.consumeOptionalSeparator(); err != nil {
-					return v, err
-				}
-			default:
-				p.back()
-				return v, p.errorf(`expected "key", "value", or %q, found %q`, terminator, tok.value)
-			}
-		}
-		mv.Set(kv.MapKey(), vv)
-		return v, nil
-	default:
-		p.back()
-		return p.unmarshalSingularValue(v, fd)
-	}
-}
-
-func (p *textParser) unmarshalSingularValue(v protoreflect.Value, fd protoreflect.FieldDescriptor) (protoreflect.Value, error) {
-	tok := p.next()
-	if tok.err != nil {
-		return v, tok.err
-	}
-	if tok.value == "" {
-		return v, p.errorf("unexpected EOF")
-	}
-
-	switch fd.Kind() {
-	case protoreflect.BoolKind:
-		switch tok.value {
-		case "true", "1", "t", "True":
-			return protoreflect.ValueOfBool(true), nil
-		case "false", "0", "f", "False":
-			return protoreflect.ValueOfBool(false), nil
-		}
-	case protoreflect.Int32Kind, protoreflect.Sint32Kind, protoreflect.Sfixed32Kind:
-		if x, err := strconv.ParseInt(tok.value, 0, 32); err == nil {
-			return protoreflect.ValueOfInt32(int32(x)), nil
-		}
-
-		// The C++ parser accepts large positive hex numbers that uses
-		// two's complement arithmetic to represent negative numbers.
-		// This feature is here for backwards compatibility with C++.
-		if strings.HasPrefix(tok.value, "0x") {
-			if x, err := strconv.ParseUint(tok.value, 0, 32); err == nil {
-				return protoreflect.ValueOfInt32(int32(-(int64(^x) + 1))), nil
-			}
-		}
-	case protoreflect.Int64Kind, protoreflect.Sint64Kind, protoreflect.Sfixed64Kind:
-		if x, err := strconv.ParseInt(tok.value, 0, 64); err == nil {
-			return protoreflect.ValueOfInt64(int64(x)), nil
-		}
-
-		// The C++ parser accepts large positive hex numbers that uses
-		// two's complement arithmetic to represent negative numbers.
-		// This feature is here for backwards compatibility with C++.
-		if strings.HasPrefix(tok.value, "0x") {
-			if x, err := strconv.ParseUint(tok.value, 0, 64); err == nil {
-				return protoreflect.ValueOfInt64(int64(-(int64(^x) + 1))), nil
-			}
-		}
-	case protoreflect.Uint32Kind, protoreflect.Fixed32Kind:
-		if x, err := strconv.ParseUint(tok.value, 0, 32); err == nil {
-			return protoreflect.ValueOfUint32(uint32(x)), nil
-		}
-	case protoreflect.Uint64Kind, protoreflect.Fixed64Kind:
-		if x, err := strconv.ParseUint(tok.value, 0, 64); err == nil {
-			return protoreflect.ValueOfUint64(uint64(x)), nil
-		}
-	case protoreflect.FloatKind:
-		// Ignore 'f' for compatibility with output generated by C++,
-		// but don't remove 'f' when the value is "-inf" or "inf".
-		v := tok.value
-		if strings.HasSuffix(v, "f") && v != "-inf" && v != "inf" {
-			v = v[:len(v)-len("f")]
-		}
-		if x, err := strconv.ParseFloat(v, 32); err == nil {
-			return protoreflect.ValueOfFloat32(float32(x)), nil
-		}
-	case protoreflect.DoubleKind:
-		// Ignore 'f' for compatibility with output generated by C++,
-		// but don't remove 'f' when the value is "-inf" or "inf".
-		v := tok.value
-		if strings.HasSuffix(v, "f") && v != "-inf" && v != "inf" {
-			v = v[:len(v)-len("f")]
-		}
-		if x, err := strconv.ParseFloat(v, 64); err == nil {
-			return protoreflect.ValueOfFloat64(float64(x)), nil
-		}
-	case protoreflect.StringKind:
-		if isQuote(tok.value[0]) {
-			return protoreflect.ValueOfString(tok.unquoted), nil
-		}
-	case protoreflect.BytesKind:
-		if isQuote(tok.value[0]) {
-			return protoreflect.ValueOfBytes([]byte(tok.unquoted)), nil
-		}
-	case protoreflect.EnumKind:
-		if x, err := strconv.ParseInt(tok.value, 0, 32); err == nil {
-			return protoreflect.ValueOfEnum(protoreflect.EnumNumber(x)), nil
-		}
-		vd := fd.Enum().Values().ByName(protoreflect.Name(tok.value))
-		if vd != nil {
-			return protoreflect.ValueOfEnum(vd.Number()), nil
-		}
-	case protoreflect.MessageKind, protoreflect.GroupKind:
-		var terminator string
-		switch tok.value {
-		case "{":
-			terminator = "}"
-		case "<":
-			terminator = ">"
-		default:
-			return v, p.errorf("expected '{' or '<', found %q", tok.value)
-		}
-		err := p.unmarshalMessage(v.Message(), terminator)
-		return v, err
-	default:
-		panic(fmt.Sprintf("invalid kind %v", fd.Kind()))
-	}
-	return v, p.errorf("invalid %v: %v", fd.Kind(), tok.value)
-}
-
-// Consume a ':' from the input stream (if the next token is a colon),
-// returning an error if a colon is needed but not present.
-func (p *textParser) checkForColon(fd protoreflect.FieldDescriptor) *ParseError {
-	tok := p.next()
-	if tok.err != nil {
-		return tok.err
-	}
-	if tok.value != ":" {
-		if fd.Message() == nil {
-			return p.errorf("expected ':', found %q", tok.value)
-		}
-		p.back()
-	}
-	return nil
-}
-
-// consumeExtensionOrAnyName consumes an extension name or an Any type URL and
-// the following ']'. It returns the name or URL consumed.
-func (p *textParser) consumeExtensionOrAnyName() (string, error) {
-	tok := p.next()
-	if tok.err != nil {
-		return "", tok.err
-	}
-
-	// If extension name or type url is quoted, it's a single token.
-	if len(tok.value) > 2 && isQuote(tok.value[0]) && tok.value[len(tok.value)-1] == tok.value[0] {
-		name, err := unquoteC(tok.value[1:len(tok.value)-1], rune(tok.value[0]))
-		if err != nil {
-			return "", err
-		}
-		return name, p.consumeToken("]")
-	}
-
-	// Consume everything up to "]"
-	var parts []string
-	for tok.value != "]" {
-		parts = append(parts, tok.value)
-		tok = p.next()
-		if tok.err != nil {
-			return "", p.errorf("unrecognized type_url or extension name: %s", tok.err)
-		}
-		if p.done && tok.value != "]" {
-			return "", p.errorf("unclosed type_url or extension name")
-		}
-	}
-	return strings.Join(parts, ""), nil
-}
-
-// consumeOptionalSeparator consumes an optional semicolon or comma.
-// It is used in unmarshalMessage to provide backward compatibility.
-func (p *textParser) consumeOptionalSeparator() error {
-	tok := p.next()
-	if tok.err != nil {
-		return tok.err
-	}
-	if tok.value != ";" && tok.value != "," {
-		p.back()
-	}
-	return nil
-}
-
-func (p *textParser) errorf(format string, a ...interface{}) *ParseError {
-	pe := &ParseError{fmt.Sprintf(format, a...), p.cur.line, p.cur.offset}
-	p.cur.err = pe
-	p.done = true
-	return pe
-}
-
-func (p *textParser) skipWhitespace() {
-	i := 0
-	for i < len(p.s) && (isWhitespace(p.s[i]) || p.s[i] == '#') {
-		if p.s[i] == '#' {
-			// comment; skip to end of line or input
-			for i < len(p.s) && p.s[i] != '\n' {
-				i++
-			}
-			if i == len(p.s) {
-				break
-			}
-		}
-		if p.s[i] == '\n' {
-			p.line++
-		}
-		i++
-	}
-	p.offset += i
-	p.s = p.s[i:len(p.s)]
-	if len(p.s) == 0 {
-		p.done = true
-	}
-}
-
-func (p *textParser) advance() {
-	// Skip whitespace
-	p.skipWhitespace()
-	if p.done {
-		return
-	}
-
-	// Start of non-whitespace
-	p.cur.err = nil
-	p.cur.offset, p.cur.line = p.offset, p.line
-	p.cur.unquoted = ""
-	switch p.s[0] {
-	case '<', '>', '{', '}', ':', '[', ']', ';', ',', '/':
-		// Single symbol
-		p.cur.value, p.s = p.s[0:1], p.s[1:len(p.s)]
-	case '"', '\'':
-		// Quoted string
-		i := 1
-		for i < len(p.s) && p.s[i] != p.s[0] && p.s[i] != '\n' {
-			if p.s[i] == '\\' && i+1 < len(p.s) {
-				// skip escaped char
-				i++
-			}
-			i++
-		}
-		if i >= len(p.s) || p.s[i] != p.s[0] {
-			p.errorf("unmatched quote")
-			return
-		}
-		unq, err := unquoteC(p.s[1:i], rune(p.s[0]))
-		if err != nil {
-			p.errorf("invalid quoted string %s: %v", p.s[0:i+1], err)
-			return
-		}
-		p.cur.value, p.s = p.s[0:i+1], p.s[i+1:len(p.s)]
-		p.cur.unquoted = unq
-	default:
-		i := 0
-		for i < len(p.s) && isIdentOrNumberChar(p.s[i]) {
-			i++
-		}
-		if i == 0 {
-			p.errorf("unexpected byte %#x", p.s[0])
-			return
-		}
-		p.cur.value, p.s = p.s[0:i], p.s[i:len(p.s)]
-	}
-	p.offset += len(p.cur.value)
-}
-
-// Back off the parser by one token. Can only be done between calls to next().
-// It makes the next advance() a no-op.
-func (p *textParser) back() { p.backed = true }
-
-// Advances the parser and returns the new current token.
-func (p *textParser) next() *token {
-	if p.backed || p.done {
-		p.backed = false
-		return &p.cur
-	}
-	p.advance()
-	if p.done {
-		p.cur.value = ""
-	} else if len(p.cur.value) > 0 && isQuote(p.cur.value[0]) {
-		// Look for multiple quoted strings separated by whitespace,
-		// and concatenate them.
-		cat := p.cur
-		for {
-			p.skipWhitespace()
-			if p.done || !isQuote(p.s[0]) {
-				break
-			}
-			p.advance()
-			if p.cur.err != nil {
-				return &p.cur
-			}
-			cat.value += " " + p.cur.value
-			cat.unquoted += p.cur.unquoted
-		}
-		p.done = false // parser may have seen EOF, but we want to return cat
-		p.cur = cat
-	}
-	return &p.cur
-}
-
-func (p *textParser) consumeToken(s string) error {
-	tok := p.next()
-	if tok.err != nil {
-		return tok.err
-	}
-	if tok.value != s {
-		p.back()
-		return p.errorf("expected %q, found %q", s, tok.value)
-	}
-	return nil
-}
-
-var errBadUTF8 = errors.New("proto: bad UTF-8")
-
-func unquoteC(s string, quote rune) (string, error) {
-	// This is based on C++'s tokenizer.cc.
-	// Despite its name, this is *not* parsing C syntax.
-	// For instance, "\0" is an invalid quoted string.
-
-	// Avoid allocation in trivial cases.
-	simple := true
-	for _, r := range s {
-		if r == '\\' || r == quote {
-			simple = false
-			break
-		}
-	}
-	if simple {
-		return s, nil
-	}
-
-	buf := make([]byte, 0, 3*len(s)/2)
-	for len(s) > 0 {
-		r, n := utf8.DecodeRuneInString(s)
-		if r == utf8.RuneError && n == 1 {
-			return "", errBadUTF8
-		}
-		s = s[n:]
-		if r != '\\' {
-			if r < utf8.RuneSelf {
-				buf = append(buf, byte(r))
-			} else {
-				buf = append(buf, string(r)...)
-			}
-			continue
-		}
-
-		ch, tail, err := unescape(s)
-		if err != nil {
-			return "", err
-		}
-		buf = append(buf, ch...)
-		s = tail
-	}
-	return string(buf), nil
-}
-
-func unescape(s string) (ch string, tail string, err error) {
-	r, n := utf8.DecodeRuneInString(s)
-	if r == utf8.RuneError && n == 1 {
-		return "", "", errBadUTF8
-	}
-	s = s[n:]
-	switch r {
-	case 'a':
-		return "\a", s, nil
-	case 'b':
-		return "\b", s, nil
-	case 'f':
-		return "\f", s, nil
-	case 'n':
-		return "\n", s, nil
-	case 'r':
-		return "\r", s, nil
-	case 't':
-		return "\t", s, nil
-	case 'v':
-		return "\v", s, nil
-	case '?':
-		return "?", s, nil // trigraph workaround
-	case '\'', '"', '\\':
-		return string(r), s, nil
-	case '0', '1', '2', '3', '4', '5', '6', '7':
-		if len(s) < 2 {
-			return "", "", fmt.Errorf(`\%c requires 2 following digits`, r)
-		}
-		ss := string(r) + s[:2]
-		s = s[2:]
-		i, err := strconv.ParseUint(ss, 8, 8)
-		if err != nil {
-			return "", "", fmt.Errorf(`\%s contains non-octal digits`, ss)
-		}
-		return string([]byte{byte(i)}), s, nil
-	case 'x', 'X', 'u', 'U':
-		var n int
-		switch r {
-		case 'x', 'X':
-			n = 2
-		case 'u':
-			n = 4
-		case 'U':
-			n = 8
-		}
-		if len(s) < n {
-			return "", "", fmt.Errorf(`\%c requires %d following digits`, r, n)
-		}
-		ss := s[:n]
-		s = s[n:]
-		i, err := strconv.ParseUint(ss, 16, 64)
-		if err != nil {
-			return "", "", fmt.Errorf(`\%c%s contains non-hexadecimal digits`, r, ss)
-		}
-		if r == 'x' || r == 'X' {
-			return string([]byte{byte(i)}), s, nil
-		}
-		if i > utf8.MaxRune {
-			return "", "", fmt.Errorf(`\%c%s is not a valid Unicode code point`, r, ss)
-		}
-		return string(rune(i)), s, nil
-	}
-	return "", "", fmt.Errorf(`unknown escape \%c`, r)
-}
-
-func isIdentOrNumberChar(c byte) bool {
-	switch {
-	case 'A' <= c && c <= 'Z', 'a' <= c && c <= 'z':
-		return true
-	case '0' <= c && c <= '9':
-		return true
-	}
-	switch c {
-	case '-', '+', '.', '_':
-		return true
-	}
-	return false
-}
-
-func isWhitespace(c byte) bool {
-	switch c {
-	case ' ', '\t', '\n', '\r':
-		return true
-	}
-	return false
-}
-
-func isQuote(c byte) bool {
-	switch c {
-	case '"', '\'':
-		return true
-	}
-	return false
-}